# main.py - MicroPython for Raspberry Pi Pico (reads soil sensor on GP26 / ADC0)
from machine import ADC
import utime

adc = ADC(26)  # GP26 is ADC0 on Pico (connect to sensor OUT)

while True:
    raw = adc.read_u16()   # 0..65535
    voltage = (raw * 3.3) / 65535  # convert to volts (assuming 3.3V scale)
    moisture_pct = (voltage / 3.3) * 100.0

    print("Raw:", raw, " Voltage: {:.2f} V".format(voltage),
          " Moisture: {:.1f} %".format(moisture_pct))
    utime.sleep(1)